Dr. Yakamats presents his answer to the Big Question: "How many bacteria are on the head of a pin?" at the 2010 Ig Nobel Prize ceremony, which took place last evening. Yakamats won the 2005 Ig Nobel Prize in Nutrition for documenting every meal he ate for 35 years. The Ig Nobel Prize honors 10 achievements in research each year, which ""first make people laugh, and then make them think."